package com.qltv.utils;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.ConnectException;
import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;

import org.apache.log4j.Logger;


import com.qltv.pojo.Token;

import net.sf.json.JSONObject;

/**
 * 
 * 类名：CommonUtil
 * 描述：通用工具类
 * @author telnet
 * 创建时间：2018年1月11日
 */
public class CommonUtil {
	
	private static final Logger logger = Logger.getLogger(CommonUtil.class);
	//凭证获取（GET）
	public static final String token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wx314b84ea36660a09&secret=98ee5ea48ec9f8763792ab1c0bbe5576";
	
	/**
	 * 发送https请求
	 * @param requestUrl 请求地址
	 * @param requestMethod 请求方式（GET、POST）
	 * @param outputStr 提交的数据
	 * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
	 */
	public static JSONObject httpsRequest(String requestUrl,String requestMethod,String outputStr){
		JSONObject jsonObject = null;
		try {
			// 创建SSLContext对象，并使用我们指定的信任管理器初始化
			TrustManager[] tm = {new MyX509TrustManager()};
			SSLContext sslContext = SSLContext.getInstance("SSL","SunJSSE");
			sslContext.init(null, tm, new java.security.SecureRandom());
			// 从上述SSLContext对象中得到SSLSocketFactory对象
			SSLSocketFactory ssf = sslContext.getSocketFactory();
			
			URL url = new URL(requestUrl);
			HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
			conn.setSSLSocketFactory(ssf);
			
			conn.setDoOutput(true);
			conn.setDoInput(true);
			conn.setUseCaches(false);
			//设置请求方式（GET/POST）
			conn.setRequestMethod(requestMethod);
			//当outputStr不为null时向输出流写数据
			if(null!=outputStr){
				OutputStream outputStream = conn.getOutputStream();
				//设置编码格式
				outputStream.write(outputStr.getBytes("utf-8"));
				outputStream.close();
			}
			
			InputStream inputStream = conn.getInputStream();
			InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
			String str = null;
			StringBuffer buffer = new StringBuffer();
			while((str=bufferedReader.readLine())!=null){
				buffer.append(str);
			}
			bufferedReader.close();
			inputStreamReader.close();
			inputStream.close();
			inputStream = null;
			conn.disconnect();
			jsonObject = JSONObject.fromObject(buffer.toString());
			
		} catch(ConnectException ce){
			logger.error("连接超时：{0}",ce);
		}
		catch (Exception e) {
			logger.error("https请求异常：{0}",e);
		}
		return jsonObject;
	}
	/**
	 * 获取接口访问凭证
	 * @param appid 凭证
	 * @param appsecret 密钥
	 * @return
	 */
	public static Token getToken(String appid,String appsecret){
		Token token = null;
		String requestUrl = token_url.replace("APPID", appid).replace("APPSECRET", appsecret);
		//发起GET请求获取凭证
		JSONObject jsonObject = httpsRequest(requestUrl, "GET", null);
		if(null!=jsonObject){
			try {
				token = new Token();
				token.setAccessToken(jsonObject.getString("access_token"));
				token.setExpiresIn(jsonObject.getInt("expires_in"));
			} catch (Exception e) {
				token = null;
				//获取失败
				logger.error(String.format("获取token失败 errcode:{0} errmsg:{1}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg")));
			}
		}
		return token;
	}
	
	/**
	 * url编码 (utf-8)
	 * @param source
	 * @return
	 */
	public static String urlEncodeUTF8(String source){
		String result = source;
		try {
			result = java.net.URLEncoder.encode(source,"utf-8");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
		return result;
	}
	
	/**
	 * 根据内容类型判断文件扩展名
	 * @param contentType 内容类型
	 * @return
	 */
	public static String getFileExt(String contentType){
		String fileExt = "";
		if("image/jpeg".equals(contentType)){
			fileExt = ".jpg";
		}else if("audio/mpeg".equals(contentType)){
			fileExt = ".mp3";
		}else if("audio/amr".equals(contentType)){
			fileExt = ".amr";
		}else if("video/mp4".equals(contentType)){
			fileExt = ".mp4";
		}else if("video/mpeg4".equals(contentType)){
			fileExt = ".mp4";
		}
		
		return fileExt;
	}
	
}
